Never use this to treat skin cancer:

http://www.dailymail.co.uk/health/article-2600537/Black-salve-ointment-leaves-man-inch-wide-HOLE-head.html

 

Man left with an inch-wide HOLE in his head after using ‘quack’ ointment to treat skin cancer

  • Australian, 55, had inch-wide hole in his temple after using ‘drawing salve’
  • Man used Black salve on side of his head for four months
  • Black salve is used as an ‘alternative medicine’ for skin lesions
  • The treatment has been condemned in both U.S. and Australia